<div class="layui-form-item">
    <label class="layui-form-label">{$vo.title|raw|default=""}</label>
    <div class="{notempty name='vo.help'}layui-input-inline{else/}layui-input-block{/notempty}" style="{$vo.extra_css|raw|default=''}" >
      <select name="{$vo.name}"  lay-filter="{$vo.name}"  lay-verify="{$vo.verify|default=''}"  {$vo.extra_attr|raw|default=''}  >
        <option value="">{$vo.placeholder}</option>
        {volist name="vo.options" id="option"}
        <option value="{$key}" {if ((string)$vo.value == (string)$key)}selected{/if}>{$option|raw}</option>
        {/volist}
      </select>
    </div>
    {// 辅助文字}
    {notempty name="vo.help"}
    <div class="layui-form-mid layui-word-aux">{$vo.help|raw}</div>
    {/notempty}
</div>
